From: Alex Deucher <alexander.deucher@amd.com>
Date: Tue, 11 Jul 2017 11:11:41 -0400
Subject: drm/amdgpu/gfx: keep all compute queues on the same pipe
Git-commit: fd971375411542f9d81111bb081e58727eb09138
Patch-mainline: v4.14-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Spreading them causes performance regressions using compute
queues on Polaris 11.
Cc: Jim Qu <jim.qu@amd.com>
Acked-by: Jim Qu <Jim.Qu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
@@ -125,7 +125,8 @@ void amdgpu_gfx_compute_queue_acquire(st
if (mec >= adev->gfx.mec.num_mec)
break;
- if (adev->gfx.mec.num_mec > 1) {
+ /* FIXME: spreading the queues across pipes causes perf regressions */
+ if (0) {
/* policy: amdgpu owns the first two queues of the first MEC */
if (mec == 0 && queue < 2)
set_bit(i, adev->gfx.mec.queue_bitmap);